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Document IIF

Mesurage des propriétés thermophysiques de lubrifiants de type polyolester de faible viscosité dans des atmosphères de dioxyde de carbone, d’éthane et d’éthylène.

Measurement of thermophysical properties of low-viscous polyol ester lubricants in carbon dioxide, ethane and ethylene atmospheres.

Numéro : pap. n. 478

Auteurs : GÖPFERT T., THOMAS C., HESSE U.

Résumé

With respect to the increasing ecological requirements on refrigerants and refrigerant mixtures new working fluids especially for temperature applications below 220 K are required. Especially low GWP refrigerants like ethane and ethylene and their binary mixtures with carbon dioxide can be interesting for specific applications were typically low-viscous lubricants are used. However the thermophysical properties of these lubricants with the mentioned refrigerants are often unknown. This paper shows the experimental results of the measurements of the saturation pressures, miscibility gaps, liquid phase densities, viscosities and interfacial tensions of nine different lubricant refrigerant mixtures. The results show differences especially in the saturation pressures and the form of the miscibility gaps for the investigated mixtures. For ternary mixtures the effect of refractionation of the refrigerant mixture inside the lubricant is shown by measuring the interfacial tension.

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Pages : 8

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Détails

  • Titre original : Measurement of thermophysical properties of low-viscous polyol ester lubricants in carbon dioxide, ethane and ethylene atmospheres.
  • Identifiant de la fiche : 30026371
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0478

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